问题 选择题

夏季,几位同学结伴到郊外游玩。看到鱼在水中漫游,蛙在湖边跳跃,蜥蜴在地上爬行,鸟在空中飞翔……面对这生机勃勃的自然景象,一个同学想到了深秋时,温度下降到l0℃,鸟和蜥蜴的耗氧量将发生怎样的变化?(    )

A.均减少

B.鸟增加,蜥蜴减少

C.均增加

D.鸟减少,蜥蜴增加

答案

答案:B

呼吸作用是生物的基本特征,进行的场所是线粒体,其表达式为:有机物+氧→二氧化碳+水+能量,在此过程中释放出大量的能量,一方面满足自身的需要,另一部分以热能的形式散失出去.当深秋时,温度下降到10℃,

由于鸟是恒温动物,在寒冷时要不断产热维持体温,所以耗氧量增加.而蜥蜴是变温动物,体温随温度变化,

温度降低酶活性下降,新陈代谢能力下降,所以耗氧量下降.

故选:B

阅读理解

For many years there’s been a debate about rewarding our children. Does it work? Is it effective?

Some people think we should establish a standard with our kids and give them something for meeting this standard as a reward. Punishment is given out in much the same way, but it’s used when certain standards of performance, behavior, etc. have not been met. Kids will often become more dutiful when threatened with punishment, and work harder when promised a valuable reward. The problem is what happens when you aren’t around.

To develop responsible, self-disciplined kids, parents need to promote certain ideas. One of these ideas is that everyone pitches in and helps in your family. Another idea is that there can be enjoyment in doing any task if we choose to make it so. When a task is for a worthy cause ( our family can enjoy the house more because I helped clean it), this message can have a big impact.

This is how we help our kids develop a sense of responsibility. When our children develop this responsibility, they’ll be more disciplined, and they’ll control their emotions better. When we give rewards to our kids, we reduce the sense of responsibility. We also create children who may temporarily perform to a certain standard, but who aren’t likely to continue the performance without the carrot hanging in front of them. 

“Rewards and punishment can change behavior for a while, but they cannot change the person who engages in the behavior,” said Alfie Kohn, author of Punished by Rewards. “Good values have to be grown from the inside out.” Parents can help give their children a sense of shared responsibility and discipline which can last a life time. The real rewards that your children receive will be their readiness for the complex and demanding world that waits for them—a world that rewards those who have learned the secrets of discipline responsibility. So keep those shiny rewarding to yourself, and let your kids find their own rewards.

小题1:According to the passage, when children are threatened with punishment, ______.

A.they may lose interest in their work

B.they may appear to be well-behaved

C.they may change to another person

D.the results will be worse than usual小题2:What can we know from Paragraph 3?

A.Parents should promote certain ideas to help children develop.

B.Children should be responsible for their discipline.

C.Children should help build a good family atmosphere.

D.No children will adapt to society without their parents’ help小题3: The underlined part “the carrot” in Paragraph 4 probably refers to _____.

A.rewards

B.aims

C.apologies

D.doubts小题4:According to the passage, Alfie Kohn would agree that parents should ______.

A.never pay attention to the way their children do things

B.show their children how to behave by example

C.never punish their children

D.help their children establish good values小题5:What’s the best title for the passage?

A.Do you often reward your children?

B.Should parents reward their children?

C.When should parents reward their children?

D.What can parents reward their children with?

单项选择题